Nazousagi is a Special Cat was added in update version 5.8 of BCJP. Nazousagi is a character from a manga written by Bakusui Kanae (麦穂かなえ) serialized in the application 「漫画プロジェクト」 by AppBank. This character can be unlocked by solving a question in the manga. The method to unlock it is to pat the Cat on the Cat Base menu during this collab's period.